P89LPC952FA datasheet(2/66 Pages) PHILIPS

Part #	P89LPC952FA

Description	8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable flash with 10-bit ADC

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Manufacturer	PHILIPS [NXP Semiconductors]

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9397 750 14716

Preliminary data sheet

Rev. 01— 16 September 2005

2 of 66

Philips Semiconductors

P89LPC952

8-bit microcontroller with 10-bit ADC

2.2 Additional features

s A high performance 80C51 CPU provides instruction cycle times of 111 ns to 222 ns

for all instructions except multiply and divide when executing at 18 MHz. This is six

times the performance of the standard 80C51 running at the same clock frequency. A

lower clock frequency for the same performance results in power savings and reduced

EMI.

s Serial ﬂash In-Circuit Programming (ICP) allows simple production coding with

commercial EPROM programmers. Flash security bits prevent reading of sensitive

application programs.

s Serial ﬂash In-System Programming (ISP) allows coding while the device is mounted

in the end application.

s In-Application Programming (IAP) of the ﬂash code memory. This allows changing the

code in a running application.

s Low voltage (brownout) detect allows a graceful system shutdown when power fails.

May optionally be conﬁgured as an interrupt.

s Idle and two different power-down reduced power modes. Improved wake-up from

Power-down mode (a LOW interrupt input starts execution). Typical power-down

current is 1

µA (total power-down with voltage comparators disabled).

s Active-LOW reset input can be driven by any internal reset. On-chip power-on reset

allows operation without external reset components. A reset counter and reset glitch

suppression circuitry prevent spurious and incomplete resets. A software reset

function is also available.

s Only power and ground connections are required to operate the P89LPC952 when

internal reset option is selected.

s Conﬁgurable on-chip oscillator with frequency range options selected by user

programmed ﬂash conﬁguration bits. Oscillator options support frequencies from

20 kHz to the maximum operating frequency of 18 MHz.

s Oscillator fail detect. The watchdog timer has a separate fully on-chip oscillator

allowing it to perform an oscillator fail detect function.

s Programmable port output conﬁguration options: quasi-bidirectional, open drain,

push-pull, input-only.

s Port ‘input pattern match’ detect. Port 0 may generate an interrupt when the value of

the pins match or do not match a programmable pattern.

s Controlled slew rate port outputs to reduce EMI. Outputs have approximately 10 ns

minimum ramp times.

s Four interrupt priority levels.

s Eight keypad interrupt inputs, plus two additional external interrupt inputs.

s Schmitt trigger port inputs.

s Second data pointer.

s Extended temperature range.

s Emulation support.

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